Results 11 to 20 of about 10,301,084 (306)
D-Branes in Para-Hermitian Geometries
Universe, 2022 We introduce T-duality invariant versions of D-branes in doubled geometry using a global covariant framework based on para-Hermitian geometry and metric algebroids.
Vincenzo Emilio Marotta +1 more
doaj +2 more sources
Journal of Geometry and Physics, 2015 This paper shows how to construct anomaly free world sheet actions in string theory with D-branes. Our method is to use Deligne cohomology and bundle gerbe theory to define geometric objects which are naturally associated to D-branes and connections on ...
Murray, Michael K +2 more
core +6 more sources
Nuclear Physics B, 1998 D-branes, topological defects in string theory on which string endpoints can live, may give new insight into the understanding of the cosmological evolution of the Universe at early epochs.
Riotto, Antonio, Maggiore, Michele
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, 2003 D-branes represent a key theoretical tool in the understanding of strongly coupled superstring theory and M-theory. They have led to many striking discoveries, including the precise microphysics underlying the thermodynamic behaviour of certain black ...
Johnson, Clifford V.
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B-type D-branes in hybrid models
SciPost PhysicsA hybrid model is a fibration of a Landau-Ginzburg orbifold over a geometric base. We study B-type D-branes in hybrid models. Imposing B-type supersymmetry on the boundary action, we show that D-branes are specified by matrix factorisations in the fibre ...
Johanna Knapp, Robert Pryor
doaj +2 more sources
D-Branes on K3-Fibrations [PDF]
Nuclear Physics B, 1999 B-type D-branes are constructed on two different K3-fibrations over IP_1 using boundary conformal field theory at the rational Gepner points of these models.
Kaste, P. +7 more
core +4 more sources
Cosmological creation of D-branes and anti-D-branes [PDF]
Journal of High Energy Physics, 2002 We argue that the early universe may be described by an initial state of space-filling branes and anti-branes. At high temperature this system is stable. At low temperature tachyons appear and lead to a phase transition, dynamics, and the creation of D-branes. These branes are cosmologically produced in a generic fashion by the Kibble mechanism.
Majumdar, Mahbub, Davis, Anne-Christine
openaire +2 more sources
A novel solution to the gravitino problem
Journal of High Energy Physics, 2023 In a general phenomenological model with local supersymmetry, the amount of massive gravitinos produced in early universe tends to violate the known dark matter density bound by many orders of magnitude.
Yu-Cheng Qiu, S.-H. Henry Tye
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Tachyon tunnelling in D-brane-anti-D-brane [PDF]
Journal of High Energy Physics, 2006 15 pages, 4 figures, Latex file, minor changes, reference ...
Bitaghsir, Kazem, Garousi, Mohammad R.
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World-volume dynamics of D-branes in a D-brane background [PDF]
Nuclear Physics B, 1999 We study the embedding of D(8-p)-branes in the background geometry of parallel Dp-branes for $p\le 6$. The D(8-p)-brane is extended along the directions orthogonal to the Dp-branes of the background. The D(8-p)-brane configuration is determined by its Dirac-Born-Infeld plus Wess-Zumino-Witten action. We find a BPS condition which solves the equation of
Camino, J. M. +2 more
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